Improv-ement in glass-iviolds



C.. D. FUX.

Glass-Molds.

Patented April 7,1874.

UNITED STATES PATENT OEEIGE.

CHARLES D. FOX, OF PHILADELPHIA, PENNSYLVANIA.

IMPROV-EMENT lN GLASS-MOLDS.

Specification forming part of Letters Patent No. 149,461, dated April 7,1874; application filed February 5, 1874.

To all whom it may concern Be it known that I, CHARLEs D. Fox, ofPhiladelphia, in the county of Philadelphia and State of Pennsylvania,have invented certain new and useful Improvements in Molds forGlassware; and I do hereby declare the following to be a full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it pertains to make and use it, referencebeing had to the accompanying drawings, which form a part of thisspecification, in which- Figure lis a vertical section through line :cx, Fig. 3. Fig. 2 is a front or inner elevation of one section of adividing-mold. Fig. 3 is an inverted plan view of sections.

My invention has for its object to provide a mold which will produceletters and figures on glassware more clearly and distinctly than anyheretofore provided.

The nature of my invention consists in forming the mold with anair-chamber, which communicates, by means of minute perforations ororifices, with the lettering or configuration on the inner walls, sothat when the glass enters the depressions for forming lettering orfiguring the air will be expelled therefrom, through the perforationsaforesaid, into the air-chamber, allowing the glass to ll up or out, andrendering the letters or figures on the ware full, clearly defined, anddistinct.

Referring to the accompanying drawing, A

represents a dividing glass-mold, of the ordinary or any suitableconstruction, the wall of its chamber having sunk lettering or iigurin gof any style or pattern. B B B are air chambers or channels, formed bycasting or drilling in the sides of the mold, said chambers being eithervertical, horizontal, or oblique, according to the direction of thelettering or figuring. C O are minute orifices or perforations extendingfrom the lettering or other depressions on the inner surface of the moldto the air-chamber, one orifice being sufficient for each letter or 1igure.

v When the glass is put into the mold in the usual manner and blown, itenters the depressions for forming the letters or figures. The aircontained therein iscompressed, having no means of escape, and preventsthe glass from completely filling up the depressions. By providing theperforations G C, however, the air contained within said depressions ispermitted to escape, and the glass enters and fills the space, so thatwhen the bottle or other vessel is withdrawn from the mold the letteringwill be found to be full, clear, and raised to the desired extent.

The air-chambers B B communicate with the groove D, in which the bottomplate fits when the sides are closed, or with the annular channel F, andwhich affords an outlet to the air expelled from the sunk lettering orfigures.

When a plate is employed, which is frequently done by inserting thesaine in a suitable groove or recess in the side of the mold, the backthereof may be cast hollow, or concaved, or a hole may be drilled in it,or the part of the mold back of said plate may be sunk to form anair-chamber, which will communicate with the sunk lettering by theperforations aforesaid.

F is an annular channel, into which the air expelled from the chambers Benters, and Gr is another channel leading to the outside of the mold. Iis the bottom plate or base of the mold.

. In View of the state of the art to which this invention pertains, asillustrated in the Patent No. 22,129, granted November 23, 1858, Ihereby disclaim such features of my invention as are embraced broadly insaid patent.

That I claim as my invention is l. A glass mold having an air-chamber,

sunk lettering or configuration, for the purpose set forth, and. havingthe vertical airehambers B, minute perforations C between said letteringor configuration, and vertical chambers, and annular grooves G F,communicating With each other, and with the airehambers B, substantiallyas shown and de! scribed.

CHARLES D. FOX.

Witnesses:

JNO. A. BELL, EUGNE P. EADsoN.

